Human Resources Certification Institute (HRCI) Practice Exam 2025 - Free HRCI Practice Questions and Study Guide

A Mean refers to the average of a set of numbers and does not accurately describe the method of updating the calculation for new hires.

B: Central tendency is a broader term that refers to the measures of the middle or average values of a set of data, and does not specifically describe the method of updating the calculation for new hires.

D: Weighted average involves assigning different weights to different numbers in a set based on their significance, and does not accurately describe the method of updating the calculation for new hires.

Overall, the term "rolling average" best describes the method of updating the calculation for new hires because it involves continuously updating a calculation by adding a recent data point and dropping the oldest one. This method is commonly used to track trends over time and smooth out any fluctuations in data.